package com.design.structure.facade.atguigu;

/**
 * @ProjectName: design
 * @Package: com.design.structure.facade.atguigu
 * @ClassName: Stereo
 * @Author: shenaiguo
 * @Description: 立体声
 * @Date: 2020/9/8 0008 23:00
 */
// 步骤 5
public class Stereo {
    private static Stereo instance = new Stereo();


    public static Stereo getInstance() { return instance;
    }


    public void on() { System.out.println(" Stereo on ");
    }


    public void off() { System.out.println(" Screen off ");
    }
    public void up() {
        System.out.println(" Screen up.. ");
    }
}
